Plural tube filter



Aug. 22, 1950 E. w. KLEIN, JR 2,519,663

RLURAL TUBE FILTER Filed Sept. 7, 1948 l 2 Sheets-Sheet l JNVENTOR. E WKZaz 72 -/7: BY

g- 1950 E. w. KLEIN, JR' 2,519,663

PLURAL TUBE FILTER Filed Sept. 7, 1948 2 Sheets-Sheet 2 w 2 h w n i n INVENTOR. EJVTEZainx/r.

Patented Aug. 22, 1950 UNITED STATES PATENT OFFICE 2,519,cs3 3 I PLURAL TUBE FILTER Edward William Klein, Jr., Atlanta, Ga. Application September 7, 1948, Serial No. 48,057

3 Claims. (01. 210-184) This invention relates to a pressurized liquid filter. An object of this invention is to provide a filter for removing solids from liquid in a continuous process.

Another object of this invention is to provide, a pressurized filter wherein the filtering medium may be cleaned without removal and the precipitated or removed solids may be removed from the tank in a continuous process.

A further object of this invention is to provide a pressurized filter embodying a plurality of filter tubes which are covered with a filtering medium, such as fabric, the tubes being perforated so that in normal operation the liquid will pass through the filter medium into the tubes. The arrangement for blowing back to clean the filter medium is such that the pressure will be evenly distributed to all of the tubes and over the complete length of each tube in order that the filter'mediums of all the tubes will be evenly cleaned.

With the above and other objects in view, my invention consists in the arrangement, combination and details of construction disclosed in the drawings and specification and then more particularly pointed out in the appended claims.

In the drawings,

Figure 1 is a diagrammatic View of a pressurized filtering system constructed according to an embodiment of this invention,

Figure 2 is a detail end elevation of the filtering tank,

Figure 3 is a fragmentary longitudinal section through the tank and one of the filtering tubes,

Figure 4 is a detail end elevation of the filtering tank at the end opposite from that shown in Figure 2.

Referring to the drawings, the numeral l designates generally a cylindrical tank which is provided with an end head I l at one end thereof and with a second end head I2 removably secured to the tank In by means of fastening devices l3.

The tank ID has mounted on the upper side thereof a dome M with which a liquid conveying pipe [5 is adapted to be connected at one end of the latter. The pipe I5 is connected at the opposite end thereof to a pump I6 and a check valve I1 is interposed in the length of the pipe I5 to prevent back flow of the liquid.

An air pressure tank l8 which is connected to a compressor I9 is connected by means of a pipe to the dome I4, and a pressure control device 2| is interposed in the pipe 20 adjacent the pres- 2 V sure tank I8 to govern the operation of the compressor. An electrically operated valve 22 is interposed in the pipe 20 closely adjacent the dome I4.

The tank ID has mounted therein aplurality of horizontally disposed tubes 23 which extend through the heads [I and |2 and the tubes 23 are provided with a plurality of openings or perforations 24. Each tube 23 has disposed thereabout one or more layers of tubular filtering fabric 25 which cover the openings 24 and provide a filtering medium whereby the liquid in the combined liquid and solid which is discharged into the tank ill will be separated from the solid, and the liquid will be removed from the tank through the head l2.

The tubes 23 at their discharge ends are connected to-a pair of outlet manifolds 26 and each manifold 26 has associated therewith an electrically operated valve 21. The tubes 23 are sealed in the heads II and H by providing a flange 28 at one end of each tube confronting the inner side of the head I and a sealing gasket 29 is interposed between the flange 28 and the head A threaded nipple 30 extends through the head II and is coupled to a nipple 3| carried by a blow back manifold 32 disposed exteriorly of the head l A nut 33 which is swivelly carried by. the nipple 3| is threaded onto the nipple 30 for detachably coupling the two nipples 30 and 3| together. At the opposite end of each tube 23 a nipple 34 extends through the head l2 and is sealed with respect to the head 12 by means of a gasket 35 interposed between the outer side of the head l2 and a nut 36 which is threaded on the nipple 34. A second nut 31 loosely engages about the outer end of the nipple 34 bearing against the outer side of the nut 36, and the nut 31 is threaded onto a nipple 38 which is welded or otherwise fixedly carried by the head I2. Tightening of the nut 31 will force the nipple 34 inwardly to compress both gaskets 29 and 35.

There are one or more blow back manifolds disposed one above the other as shown in Figure 2, and these manifolds are connected together by means of a connecting pipe 39. Each manifold 32has associated therewith an electrically operated valve so that the manifolds 32 may be separately cut off or communicated with a. pipe 4| which connects the connecting member 39 with the air pressure pipe 20.

In the use and operation of this system, the combination liquid and solids are pumped by the pump I6 and discharged into the tank I0 through the pipe l5. The level of the combined liquid and solids in the tank is regulated by means of a float control member 42 which is preferably connected with the operator for the pump l6. At the same time that the combined liquid and solids are being discharged into the tank H3, air pressure is maintained on the tank ID from the air pressure tank l8 through the pipe 20,

Valve 12 is open during the normal operation of the system and at thisgtime valves lmconnected with the manifolds 32 are closed. Valves 2'! are open and the pressure of air in the tank It! is slightly less than the pressure of th combined liquid and solids. The tank In has connected -to the lower portion thereof a plurality of outlet pipes 43 with which manually operable valves 44 are connected so that the solids removedfromthe liquid may be discharged in a continuous process at predetermined rates. The dome I4 has exending upward y therefrom a rent p pe 45 w ich el ct i al y p ate va ve ,46 is i t posed. During the normalqperat on Qfth 5X tem, valve '46 is closed so that the desired pressure may be maintained within ,the tank lil When it isdes red toplean the filtering r ediumslorsleeves 25, the pump is .is cutoff and valves '22 and 2-7 areclosed. Mali/es 40 are opened so :tha t the air pressur from ank I18 ilh e com u te to the manitolds 32 and into the interior of the 213 This air pressure will put a reverse pr s e n th fi t imediums .Q sleeves 1 5. so as i ow of o ptberwise iclean :the fabrics- W h. a i terin .system as e einbefore ,deserib d, solid may be removed from liquids in the continuous process under predetermined pressure.

Ldonot means to confine myselfvto theiexact detailsof constructionhereindisclosed, but claim all variations falling within the purview of the appended claims.

What-I claim is:

=1. filter comprising a tank having opposite end Walls, a plurality of perforate tubes disposed longitudinally in said tank and having theopposite ends thereof extending through said end'walls, each of 'saidtubes including an annular flange extending radially therefrom inwardly of one of said -end;walls, a sealing-member interposed between said flange andsaid one of said end "walls,

tubes including an annular flange formed there- =on inwardly of one of said end walls, a nut member threaded on the opposite end of the tube outwardly of the other end wall, sealing means interposed betweensaid flange and said one end wall and between said nut member and said other end wall, and means carried by said other end wall engageable with said nut member and adapted to movesaid tubertowards saidione endiwall uforicompressing said sealing means to thereby seal said end walls.

:3. A filter according to claim ,2 wherein said last named means includes a cylindrical exterinally threaded membenextending outwardly from said otherend wall concentrically withsaidopposite end of said :tube, .and an annular 'plateloosely engaging on .said opposite vend and having a rightangular peripheral flangeinternally thread,- ed and engaging ion .said cylindrical member, threading :said plate towards said other-lend wall effecting engagement of said plate-with said .nut member :for :urging said tube towards said one end wall.

EDWARD "W LL AM J REFERENCES CITED The following references are ,of record .in the file of this patent:

UNE EED STATE-S BAIENJ'S Number Name Date 930,-1-67' lilnd-ler Aug, 3, 1909 2,016,163 -Wilderman Oct. 1, 1935 2,035,592- Christensen Mar. 31, 1936 2,113,923 Miller Apr. '12, 1938 2,301,803 Davis Nov. 10, .1942 

